Stackable chair



FIG. 1 is a perspective view of a stackable chair, this view being taken from above and from the left side;

FIG. 2 is a right side view of the stackable chair;

FIG. 3 is a front view of the stackable chair;

FIG. 4 is a top view of the stackable chair; and,

FIG. 5 is a rear view of the stackable chair.

FIG. 2 through 5 have been shown on a reduced scale with respect to FIG. 1. 

The ornamental design for a stackable chair, as shown and described. 